How do you know what brand of spark plugs to buy?

Get yourself some split fires :loser:
You can buy any brand you want
For real I suggest NGK's
Spark plugs wont make a noticeable difference unless its a fully built engine or maybe the incorrect plugs. Also platinum tipped plugs aren't recommended unless the car came with them from the factory.

4 plugs from Honda cost me only like $5.00

yeah dude, i agree, get some split fires. I got some for a little more than the regular one pronged plugs and gapped them good and it made a world of difference in how my engine performs and sounds now! its amazing what a little thing like that can do for performance.

HAHA, I was joking about the Split Fires. If you think they add power, more power to ya.

jackasssi,
Hey, what exactly is not good about putting platinum plugs in a car that are not OEM. I just never heard about this and thought platinums are better in general.
I've replaced my plugs once with OEM NGKs. I had an oil leak which fouled them. So, after the oil leak repair, I decided to replaced them with Bosch Platinum 2s. They have a platinum tip and two prongs that are pre-gapped. My car seems to be running fine. This is a 96 Accord LX.

How do you know what brand of spark plugs to buy?

You can get any brand. OEM spark plugs are NGKs for Accords.

At the auto parts store (or Wal-Mart if you are cheap like me), there is usually a reference book or something that will list all plugs, with their part number, that will work properly for your car.